Cannot add user, all the user directories are read-only.

[mlassau_atlassian]

Most likely you have added an external LDAP (or Crowd) user directory, and then disabled the built-in "Internal" user directory.

What do you actually want to do? Add a user to LDAP (Crowd) ? then contact the LDAP admin.

Add a user to the Internal directory? Then you need to re-activate it.

... or add some more details to the question

[Nic Brough -Adaptavist-]

You'll need to make one of them read/write in order to add someone to it.

[Ruchi]

Hi,

How to make it read/write?

[Nic Brough -Adaptavist-]

As a Jira admin, change it to read/write.

You may need to talk to the admins of the directory - that could also be read-only, and that will need updating to allow Jira to write to it.